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Block Diagrams
3-2
3-2 Main Base Band
VCC
SYSTEM
CLOCK
SYSTEM
RAM 4M
FLASH
ROM 16M
EEPROM 128K
8M ROM (Voice
Recognition)
KeyPad
Graphic LCD
(115*60)
SIM Card
B.B Interface
POWER
Circuit
GSM/DCS
RF interface
Serial Data
Interface
+3V SIM Card
+5V SIM Card
Battery Voltage
Battery
Temperature
GSM PLL
3V Tx
AVCC
RF PSU
Multi
Switch
Array
I/O Interface
A/D Interface
I/O BB Filter
PLL
GSM/DCS
VOCODER
Memory
Charging Circuit
Li_lon Battery (3.6V)
GSM/DCS
KERNEL 5
DCS PLL
GSM Tx
DCS Tx
GSM PSU
DCS PSU